Dual Photography
mm648230 · 4 HN recommendations
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The SIGGRAPH 2005 demo of dual photography from Stanford, which swaps the roles of projector and camera to render a scene from the light's point of view. It includes the reveal of a hidden playing card.
Why HN recommends it: Cited whenever threads discuss recovering hidden images or non-line-of-sight imaging, as a clear demonstration of light transport.
“Skip ahead to 4:19 for a succinct demo.” Read on HN ↗